Applying threaded bracing rods to trees



'sept.2`s,` 19221; 1,685,151

P. H. DgvEY Er Al.

APPLYING THREADED BRAGIG RODS TOTREES Filed Nov. 21;, 1925 figa.

'ZZ v uNvEm-o'ns Fatented Slept. 25, 1923,.4

l am@ mes vPAUL H. fnnvn AND WILLIAM n. WILLIAMS, vor

OF ONEFOURTH TO'JAIVIES ALG. DAVEE OF SOUND BEACH, CONNECTICUT,AND

SAID WILLIAMS ASsIGNoarro THE Devi-:Y .TREE EXPERT commi-NY, .or Irnn'r,l

OHIO, A coRPoRATIoN or OHIO.

. APPLYING 'IHREADED BRACING none 'ro .mnnnsf .Application filed November 21, 1925." serial No, v70,499'.

The present invention relatesl to applying threaded bracing rods' to'trees, and particularly to the method and tools for so applying the bracing rods. l f' In the practice of tree surgery, ithas yoften been necessary vor desirable to apply bracing rods to hold parts of the tree, as for example,

to apply bracing rods to hold the two sides of l Van excavated cavity ortoY hold t-he branches of a tree to prevent splitting in a crotch.

rlhe present invention is illustrated with particular reference to the application. of bracing rods to hold the sides of a tree cavity,

but it will be understood that the bracing rods might be applied to other parts ofthe tree.

'ln the drawings which illustrate the application of bracing` rods to a tree cavity:A

Figure l is a horizontal section through the tree cavity and hole drilled to receive the rod; v

Figure 2 is a similar view showing the The tool has 'a forwardly extending guide formed by the rotting out or destruction of the wood is first further excavatedto carefully clean out all infected or dead wood and vis afterward filled with cement; the filling being usually put in in sections as shown in the patent of Vellington E. Davey, No. 958,478, dated May 17, 1910, for process of reinforcing trees. Inv filling cavities which are large in comparison with the tree trunlror branch, the parts of the tree on each side of the cavity are tied together by bracing rods to strengthen the tree and'to prevent the wood from pulling away from the filling.

As shown in the drawings, the two parts of the tree at each side of the cavity are tied together` by a bracing rod 3, as shown in Figure The cement filling which is put into y In accordance with the Y holes may be drilled yure 4. f practiceof the presentinvention, we vuse screw-threaded bracydrill and tap the rod-receiving holesin the Y i to drill aligned holes,

indicatedat 5` and 6 in Figure 1. TheseI holes be drilled` out with 'an ordinary auger,

bar having its middle portion formed as a tap 8 to cut screw threads'in the holes. This tap-v ping portionj 8 is madewith the usual interrupted tap threads as shown -in the drawing.

portion 9, ywhich is arranged tofprecede the tapping portion into ythejhole and guide it. This guiding portion 9 is smooth and is preferably such as to form a. rather loose sliding fit through the hole to be tapped. The tapping tool has a shank vsquaredor attened end 10a, to be received in a bit brace or similar driving tool, preferably power driven. In case of a hole which is nearly asv long as the tapping tool, lthe tapping tool may be turned in as far as the engagement with `its; driving tool will permit and until the guide portion 9 emerges, and then the tapping operation maybe continued by turning thetool by engaging the projecting guide portion 9 with a pipe l0, having a KENT, oIILIo; SAID nAvEY Assreivort the cavity after the bracingrodsarein place v1s indicated by reference*numeralf1V in Fig-i Vtree before insertingthe bracing rod.V TheV first step, is

which mayoccur due to inequality inthe hardness or grain of the Wood. VThey also Y serve` to insure the better entry ofthe tap- Figure 3. The r at the o Y Aeated in- Aft/er the holes are `piece of bracing rod 3 is cut off from a previping tool intothe second hole when the tool 1s passing through one aligned hole to the other, as for exam le, in entering the hole site enl f the cavity, as indigure 2. f

drilled and tapped, a

ously threaded rod of indeterminate length. The bracing rod 3 is inserted into the threaded end of the tap ed hole, as indicated in means of the screwing-in tool 11,. shown in detail in Fi ure 6. This toolhas a threaded :*avity}12,'vvV lich fits over the rear end of the bracing rod 3, and a shortI shank portion 13,

arrangedV toV be engaged by a bit lbrace or similar driving tool. As shown' in Figure 3, the bracing rod may be screwed in with the tool 11 untill itis nearly in place. The tool .'11 is then removed and the rod is turned home by engaging its intermediate portion,

is partly screwed in byr which is exposed in theV cavity, With a pipe Wrench or similar tool and turning the rod into the position shown in Figure 4. `The be` otherwise used, l

The method y'oftreating a tree cavity'eon- Y .sistinfr in forming uniform openings in the side edges of the cavity, threading said openings, and'connecting saidthread'ed openings by bracing means filling saidopenings and terminating at or near the outer Y Intestimony fwhereofwe have hereunto set our hands.

PAUL DAvEY. WILLIAM R. WILLIAMS.

4oy ends thereof. f 1 

